Abstract
This paper gives an overview of what kind of information and how deep can we go into the structure determination of materials, in metastable states, using neutron powder thermo-diffraction, whether temperature induced crystallisation and phase segregation processes have to be completely understood. We have obtained, by means of high energy ball milling technique, four different Fe-based compounds, showing unique characteristics (nanostructured Fe, FeNi alloys, FeCu solid solutions and FeZr amorphous alloys). In situ neutron diffraction experiments have been carried out in the temperature range between 300 and 1220 K in order to study the great variety of structural changes that takes place in these compounds. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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